I just got a Dell UltraSharp U3415W hooked up to my i5 SP3 w/dock. I noticed that if I setup the monitor with Display Port 1.2 settings, the monitor will flicker on and off and resolution will reset randomly when coming out of sleep. When I turn DP 1.2 off, everything is fine. I replaced the stock Dell cable with a StarTech (StarTech.com 6 ft Mini DisplayPort to DisplayPort 1.2 Adapter Cable M/M - DisplayPort 4k with HBR2 support - 6 feet Mini DP to DP Cable) and the issue is still happening with DP 1.2. Does anyone have any suggestions? Thanks!